Add-ons
Message Composition
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Mail Merge
Mass Mail and Personal Mail
62,655 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.71,439 users -
Switch the signature on/off or choose a new one from your predefined set.65,266 users -
Extension to mimic Outlook Express Stationery.
Allow you to use HTML files as templates for mail. Also allow custom template in replies or forwarded mail!28,802 users -
ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.24,800 users -
SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.19,278 users
Top Rated See all »
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Default "Reply" functionality pays attention to "Reply-To" in original email364 users -
Thunderbird HTML editor. This add-on adds a HTML tab to the composition window where you can see and edit the HTML source of the message.4,667 users -
Add menu commands for replying to multiple messages at the same time.584 users -
True "Send Later" functionality to schedule the time for sending an email.71,439 users
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SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.19,278 users
Recently Added See all »
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Uploads your large attachments to your DropBox instead of sending them by email49 users -
Shows a colorful border around the "New Message" window, so you can tell different identities apart.
Builds on the original BorderColors and the "GT" version, adding different border styles.503 users -
Change direction from Left to Right and Right to Left for Persian, Arabic, Hebrew etc. This Thunderbird extension is based on ComposeRTF available in https://addons.thunderbird.net/en-US/thunderbird/addon/composertf/88 users -
Easily send large attachments with Thunderbird without leaving your email!21 users -
Type some text in your mail's body, hit the asciidoctor button and transform your mail into a pretty html5 asciidoctor document. Font awesome and code highlighting are enabled.91 users -
Adiciona um botão para copiar o Assunto do email selecionado para a área de transferência
Add a button to copy the Subject line of the selected email to the clipboard2 users
See all 109 extensions in Message Composition »
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